Step-by-Step Solution

for Monday 14th April Diabolical

Number 1 is the only value possible in cell (5,9).

Single Candidate

Number 8 is the only value possible in cell (5,1).

Single Candidate

Number 6 is the only value possible in cell (2,1).

Single Candidate

Number 1 is the only value possible in cell (4,1).

Single Candidate

Number 5 is the only value possible in cell (3,1).

Single Candidate

Number 7 is the only value possible in cell (7,1).

Single Candidate

Number 4 is the only value possible in cell (5,2).

Single Candidate

Number 3 is the only value possible in cell (2,2).

Single Candidate

Number 7 is the only value possible in cell (1,2).

Single Candidate

Number 1 is the only value possible in cell (3,2).

Single Candidate

Number 6 is the only value possible in cell (4,2).

Single Candidate

Number 5 is the only value possible in cell (9,2).

Single Candidate

Number 8 is the only value possible in cell (1,3).

Single Candidate

Number 4 is the only value possible in cell (2,3).

Single Candidate

Number 2 is the only value possible in cell (6,3).

Single Candidate

For row 6, number 6 is only possible in cell (3,6)

Single Position

For row 6, number 3 is only possible in cell (4,6)

Single Position

For box 6, candidates for 7 are all in row 5, so you can remove candidates from other blocks.

Candidate Lines

For box 7, candidates for 2 are all in row 7, so you can remove candidates from other blocks.

Candidate Lines

Candidates for 4 in boxes 4 and 5 force the candidates in box 6 to be in the remaining line.

Multiple Lines

Hidden Triple for 1, 7 and 8, can remove other candidates from these cells.

Hidden Triples

For row 7, number 6 is only possible in cell (1,7)

Single Position

Either candidate for cell (6,6) forces 2 into cell (9,6).

Forcing Chains

Number 3 is the only value possible in cell (9,8).

Single Candidate

Number 1 is the only value possible in cell (9,3).

Single Candidate

Number 6 is the only value possible in cell (8,3).

Single Candidate

Number 3 is the only value possible in cell (7,3).

Single Candidate

Number 9 is the only value possible in cell (1,8).

Single Candidate

Number 5 is the only value possible in cell (1,4).

Single Candidate

Number 3 is the only value possible in cell (1,5).

Single Candidate

Number 5 is the only value possible in cell (5,8).

Single Candidate

Number 9 is the only value possible in cell (5,6).

Single Candidate

Number 2 is the only value possible in cell (5,4).

Single Candidate

Number 4 is the only value possible in cell (4,5).

Single Candidate

Number 7 is the only value possible in cell (4,4).

Single Candidate

Number 4 is the only value possible in cell (7,6).

Single Candidate

Number 9 is the only value possible in cell (4,7).

Single Candidate

Number 6 is the only value possible in cell (6,8).

Single Candidate

Number 2 is the only value possible in cell (7,8).

Single Candidate

Number 4 is the only value possible in cell (8,8).

Single Candidate

Number 7 is the only value possible in cell (6,9).

Single Candidate

Number 6 is the only value possible in cell (7,9).

Single Candidate

Number 8 is the only value possible in cell (8,9).

Single Candidate

Number 5 is the only value possible in cell (8,6).

Single Candidate

Number 8 is the only value possible in cell (6,6).

Single Candidate

Number 1 is the only value possible in cell (6,4).

Single Candidate

Number 9 is the only value possible in cell (7,4).

Single Candidate

Number 8 is the only value possible in cell (2,4).

Single Candidate

Number 4 is the only value possible in cell (3,4).

Single Candidate

Number 2 is the only value possible in cell (3,5).

Single Candidate

Number 9 is the only value possible in cell (2,5).

Single Candidate

Number 5 is the only value possible in cell (6,5).

Single Candidate

Number 1 is the only value possible in cell (7,5).

Single Candidate

Number 7 is the only value possible in cell (8,5).

Single Candidate

Number 8 is the only value possible in cell (9,5).

Single Candidate

Number 2 is the only value possible in cell (2,7).

Single Candidate

Number 8 is the only value possible in cell (3,7).

Single Candidate

Number 1 is the only value possible in cell (8,7).

Single Candidate

Number 7 is the only value possible in cell (9,7).

Single Candidate

Number 3 is the only value possible in cell (3,9).

Single Candidate